How to docinematics with high details?

Hi, i am trying to make an vizualization of an park with buildings. All those object will be several ,levels", but i want to be able to see out of an building into the park and ,back". All that only for a couple of Videos and couple of snapshots. But when i open the kite demo, and play as character, my computer seems not handle the details when moving. If i am gonna use an maintainee camera can i than somehow force my computer to create an video with higher details ? Also is level streaming the best way to handle an Level with multiple inside level(Park1,Park2,Building,Inside Building) ? In the Demo almost everthing seems to be ,leveled" is that neccesary? If not can u please write me down what i can google to make things better from the begining ?

All i want is to get an couple of videos with the same high quality(fps…) as in the kite demo and to learn the best practice to work with it

Intel® Core™ i7 5950HQ / 5700HQ processor
GeForce GTX 980M